Apparently, though unproven, at 00:46 on Monday 09 May 2011, Peter Humphrey
did opine thusly:
> On Sunday 08 May 2011 23:02:16 Alan McKinnon wrote:
> > Apparently, though unproven, at 00:14 on Monday 09 May 2011, john did
> > opine
> > thusly:
> > > Great widgets. Not sure what a Molar Mass Calculator does? Perhaps
> > > weighs your teeth??
> > :
> > :-)
> > "Molar" as in the adjective describing "mole" as in "quantity of matter"
> > as in "some gigantic number of identical atoms (or maybe it's
> > molecules)". It's a very useful measure of "some quantity of stuff".
> > IIRC the gigantic number is Avogadro's number, on the order of 10^124. So
> > one mole of hydrogen would be the amount of hydrogen containing that
> > number of hydrogen atoms (or maybe it's molecules. Whatever.)
> Here's a quotation from http://en.wikipedia.org/wiki/Mole_%28unit%29:
> "The mole is defined as the amount of substance that contains as many
> elementary entities (e.g., atoms, molecules, ions, electrons) as there are
> atoms in 12 g of the isotope carbon-12 (12C). Thus, by definition, one
> mole of pure 12C has a mass of exactly 12 g." (I don't know how those
> super- and subscript numbers will appear in e-mail.)
> You just knew you were setting yourself up, didn't you?
It's near midnight on a Sunday and I'm knackered after a weekend of being
father to 2 nine-year old girls - I hadn't even begun thinking it that far
I just knew I was being uber-lazy and expected someone else to do the heavy
lifting of looking up the reference.
You just knew I was I was being a lazy old fart, didn't you?
alan dot mckinnon at gmail dot com